
"""simple docstring"""




from ...configuration_utils import PretrainedConfig
from ...utils import logging


_A     :			str  						=			logging.get_logger(__name__)

class 						a__		( snake_case__		):
   __lowerCAmelCase				=							"""timm_backbone"""
   def __init__(     self      ,       _a=None      ,       _a=3      ,       _a=True      ,       _a=True      ,       _a=None      ,       **_a      ,       ):
          super().__init__(**__snake_case							)
          lowercase       :							Optional[Any]									=				backbone
          lowercase       :							Optional[int]									=				num_channels
          lowercase       :							Optional[Any]									=				features_only
          lowercase       :							str									=				use_pretrained_backbone
          lowercase       :							Any									=				True
          lowercase       :							List[Any]									=				out_indices if out_indices is not None else (-1,)






def      UpperCAmelCase__		(UpperCamelCase_ = 10_00							):



     """simple docstring"""






     return sum(2 * a * ((a - 1) // 2) for a in range(3				,n + 1							)							)


if __name__ == "__main__":
 print(solution())




